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UCC2808A-2Q1 PDF预览

UCC2808A-2Q1

更新时间： 2024-11-28 05:52:59
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
11页 252K
描述
LOW POWER CURRENT MODE PUSH-PULL PWM

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UCC2808A-2Q1 数据手册

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SGLS183A − AUGUST 2003 − REVISED APRIL 2008  
D PACKAGE  
(TOP VIEW)  
D
D
Qualified for Automotive Applications  
ESD Protection Exceeds 1500 V Per  
MIL-STD-883, Method 3015; Exceeds 200 V  
Using Machine Model (C = 200 pF, R = 0)  
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8
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VDD  
COMP  
FB  
OUTA  
OUTB  
GND  
D
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D
Dual Output Drive Stages in Push-Pull  
Configuration  
CS  
RC  
Current Sense Discharge Transistor to  
Improve Dynamic Response  
PW PACKAGE  
(TOP VIEW)  
130-µA Typical Starting Current  
1-mA Typical Run Current  
Operation to 1 MHz  
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5
OUTA  
VDD  
COMP  
FB  
OUTB  
GND  
RC  
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3
4
Internal Soft Start  
CS  
On-Chip Error Amplifier With 2-MHz Gain  
Bandwidth Product  
D
On Chip VDD Clamping  
D
Output Drive Stages Capable of 500-mA  
Peak-Source Current, 1-A Peak-Sink  
Current  
description  
The UCC2808A is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The  
UCC2808A contains all of the control and drive circuitry required for off-line or dc-to-dc fixed frequency  
current-mode switching power supplies with minimal external parts count.  
The UCC2808A dual output drive stages are arranged in a push-pull configuration. Both outputs switch at half  
the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 60 ns to  
200 ns depending on the values of the timing capacitor and resistors, thus limiting each output stage duty cycle  
to less than 50%.  
The UCC2808A family offers a variety of package options and choice of undervoltage lockout levels. The family  
has UVLO thresholds and hysteresis options for off-line and battery powered systems. Thresholds are shown  
in the ordering information table.  
The UCC2808A is an enhanced version of the UCC2808 family. The significant difference is that the A versions  
feature an internal discharge transistor from the CS pin to ground, which is activated each clock cycle during  
the oscillator dead time. The feature discharges any filter capacitance on the CS pin during each cycle and helps  
minimize filter capacitor values and current sense delay.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
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Copyright 2008 Texas Instruments Incorporated  
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ꢞ ꢢ ꢟ ꢞꢗ ꢘꢬ ꢚꢙ ꢝ ꢥꢥ ꢣꢝ ꢛ ꢝ ꢜ ꢢ ꢞ ꢢ ꢛ ꢟ ꢧ  
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...11

中文翻译

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UCC2808A-2Q1 替代型号

型号 品牌 替代类型 描述 数据表
UCC2808A-1Q1 TI

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